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authorStefan Metzmacher <metze@samba.org>2010-08-03 13:24:22 +0400
committerSteve French <sfrench@us.ibm.com>2010-09-29 23:04:30 +0400
commit18bddd1059c5d1e17ad6e49c514c95484aa80a33 (patch)
tree1c57174579d54d536dd269a22f2458bc500825dd /fs/cifs/link.c
parent0fd43ae4758b2841656afda4439b80e8a3603af2 (diff)
downloadlinux-18bddd1059c5d1e17ad6e49c514c95484aa80a33.tar.xz
cifs: implement CIFSFormatMFSymlink()
Signed-off-by: Stefan Metzmacher <metze@samba.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/link.c')
-rw-r--r--fs/cifs/link.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 6e4e8957595d..0473a86031a5 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -92,6 +92,47 @@ CIFSParseMFSymlink(const u8 *buf,
}
static int
+CIFSFormatMFSymlink(u8 *buf, unsigned int buf_len, const char *link_str)
+{
+ unsigned int link_len;
+ unsigned int ofs;
+ struct MD5Context md5_ctx;
+ u8 md5_hash[16];
+
+ if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE)
+ return -EINVAL;
+
+ link_len = strlen(link_str);
+
+ if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
+ return -ENAMETOOLONG;
+
+ cifs_MD5_init(&md5_ctx);
+ cifs_MD5_update(&md5_ctx, (const u8 *)link_str, link_len);
+ cifs_MD5_final(md5_hash, &md5_ctx);
+
+ snprintf(buf, buf_len,
+ CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT,
+ link_len,
+ CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
+
+ ofs = CIFS_MF_SYMLINK_LINK_OFFSET;
+ memcpy(buf + ofs, link_str, link_len);
+
+ ofs += link_len;
+ if (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
+ buf[ofs] = '\n';
+ ofs++;
+ }
+
+ while (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
+ buf[ofs] = ' ';
+ ofs++;
+ }
+
+ return 0;
+}
+
CIFSQueryMFSymLink(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, char **symlinkinfo,
const struct nls_table *nls_codepage, int remap)